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WAEC Agricultural Science 2026 Question 13

Question 13

Rocks and Soil Formation

The diagram below illustrates the vertical section of a typical soil.
The layer that determines the chemical composition of soil is labelled

Diagram for this question
  1. A.I
  2. B.II
  3. C.III
  4. D.IV
Show the answer and explanation

Answer: D (IV)

Explanation

IV is the parent rock, from which the soil's minerals come.